Brain metastasis is a dreaded complication among patients of different cancers, including lung cancer. Approximately 16 to 22% of patients with lung cancer develop brain metastases. Non small cell lung carcinoma (NSCLC) accounts for the maximum proportion of all lung cancer cases. Brain metastases during presentation carries a poorer prognosis than metachronous brain metastases in NSCLC cases. This study was aimed to retrospectively analyze the epidemiological pattern of NSCLC patients presenting with brain metastases, attending a tertiary health care centre during a period of one year. Total 22 patients, out of 198 NSCLC cases had brain metastases at presentation. There was not much difference in rate of brain metastases between male and female. Rate of brain metastases at presentation was more in case of adenocarcinoma, than in squamous cell carcinoma, though the difference was not statistically significant.